It is officially Akainu for reason. All road lead to akainu. 2010 man for reason. Back in 2016, people think admirals are yonko comanders and saying Admiral and yonko are equal are consistent hot take. Sabo vs Akainu is develop by anti Admirals became due possible pirate King luffy goes extreme difficulty with Akainu
Then it chain to other Admirals which people downplay. Fuijtoria is example and people did legit think king or yc1 can beat him. Jack is Admiral level take on YouTube comments worh hundred likes.
Compare to Seryu from Akame ga kill, she is hated but not powerscaling due killing popular character and manic justice but she is unknown to casual, which Esdeath is more known.
Akainu, Shanks, and Mihawk are more iconic due powerscaling and expose to causal. Akainu is known for man kill Ace.
Unlike most villains like even Bowser. None of them has hated like Akainu on Luffy. Not even one piece villains doesn't. Imu see Nika as fate to his downfall not hated. In MF arc, Akainu has being chasing luffy to kill him ignoring Ace, Whitebeard, Blackbeard but only luffy is top target for him to kill. No logical reason to do when Blackbeard exists.
I never seen character who personally hate one guy like Akainu in fiction. Not even Ganondorf due much fate and get own by links many times.
Yet Luffy vs Akainu matchjp is hot take by one piece Fandom or they think Akainu will get bluneo or fight Sabo.
Also Akainu is character create butthurt than any fiction characters in history.